The concentration of the aqueous solution of ethylene glycol with the given value of boiling point is to be calculated. Concept Introduction: The mass percent of ethylene glycol in the given solution is calculated by the formula, Mass % of C 2 H 6 O 2 = Mass of C 2 H 6 O 2 Total mass × 100 % To determine: The composition of the given solution in terms of mass percent.

Question

Using the conditions of spontaneity to deduce the signs of AH and AS Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction observations conclusions A This reaction is always spontaneous, but proceeds slower at temperatures above 120. °C. ΔΗ is (pick one) AS is (pick one) ΔΗ is (pick one) B This reaction is spontaneous except above 117. °C. AS is (pick one) ΔΗ is (pick one) This reaction is slower below 20. °C than C above. AS is |(pick one) ? 18 Ar 1

Answer 1

Question

Chapter 12, Problem 62E

Interpretation Introduction

Interpretation:

The concentration of the aqueous solution of ethylene glycol with the given value of boiling point is to be calculated.

Concept Introduction: The mass percent of ethylene glycol in the given solution is calculated by the formula,

Mass % of C2H6O2=Mass of C2H6O2Total mass×100 %

To determine: The composition of the given solution in terms of mass percent.

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